/*
 * Copyright 2011 ArcBees Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.arcbees.server.auth;

import com.google.inject.Inject;
import com.google.inject.Provider;
import com.gwtplatform.dispatch.server.ExecutionContext;
import com.gwtplatform.dispatch.server.actionhandler.AbstractActionHandler;
import com.gwtplatform.dispatch.shared.ActionException;

/**
 * @author Christian Goudreau
 */
public class LogInHandler extends AbstractActionHandler<LogIn, GetResults<UserDto>> {
  private final Authenticator authenticator;
  private final Provider<UserDao> userDaoProvider;

  @Inject
  LogInHandler(final Authenticator authenticator,
      final Provider<UserDao> userDaoProvider) {
    super(LogIn.class);
    
    this.authenticator = authenticator;
    this.userDaoProvider = userDaoProvider;
  }

  @Override
  public GetResults<UserDto> execute(LogIn action,
      ExecutionContext context) throws ActionException {

    return new GetResults<UserDto>(getUser(action.getUser()));
  }

  private UserDto getUser(UserDto user) throws ActionException {
    UserDao userDao = userDaoProvider.get();

    if (userDao.authenticate(user)) {
      authenticator.authenticate(user.getEmail());

      return userDao.loadUserDto(user.getEmail());
    } 

    throw new ActionException();
  }
}